DE4423728A1 - Process for the treatment and environmentally sound recovery of asbestos cement products - Google Patents
Process for the treatment and environmentally sound recovery of asbestos cement productsInfo
- Publication number
- DE4423728A1 DE4423728A1 DE4423728A DE4423728A DE4423728A1 DE 4423728 A1 DE4423728 A1 DE 4423728A1 DE 4423728 A DE4423728 A DE 4423728A DE 4423728 A DE4423728 A DE 4423728A DE 4423728 A1 DE4423728 A1 DE 4423728A1
- Authority
- DE
- Germany
- Prior art keywords
- cement
- asbestos
- asbestos cement
- treatment
- clinker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000010425 asbestos Substances 0.000 title claims abstract description 53
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 53
- 239000004568 cement Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 16
- 238000011084 recovery Methods 0.000 title claims description 3
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000446 fuel Substances 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims abstract 3
- 235000013312 flour Nutrition 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 235000012054 meals Nutrition 0.000 claims description 8
- 239000004449 solid propellant Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 13
- 239000000047 product Substances 0.000 description 9
- 239000011521 glass Substances 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 229910052839 forsterite Inorganic materials 0.000 description 2
- 239000000383 hazardous chemical Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- -1 Alkali metal salts Chemical class 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001364 causal effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229910052620 chrysotile Inorganic materials 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 235000012243 magnesium silicates Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000021180 meal component Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- ULEFFCDROVNTRO-UHFFFAOYSA-N trimagnesium;disodium;dihydroxy(oxo)silane;iron(3+) Chemical compound [Na+].[Na+].[Mg+2].[Mg+2].[Mg+2].[Fe+3].[Fe+3].O[Si](O)=O.O[Si](O)=O.O[Si](O)=O.O[Si](O)=O.O[Si](O)=O.O[Si](O)=O.O[Si](O)=O.O[Si](O)=O ULEFFCDROVNTRO-UHFFFAOYSA-N 0.000 description 1
- CWBIFDGMOSWLRQ-UHFFFAOYSA-N trimagnesium;hydroxy(trioxido)silane;hydrate Chemical compound O.[Mg+2].[Mg+2].[Mg+2].O[Si]([O-])([O-])[O-].O[Si]([O-])([O-])[O-] CWBIFDGMOSWLRQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/0066—Disposal of asbestos
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Behandlung und umweltverträglichen Verwertung von Asbestzementprodukten unter Einbeziehung eines thermischen Verfahrens zur Umwandlung der Asbestkomponente.The invention relates to a method for the treatment and environmentally sound recovery of Asbestos cement products incorporating a thermal conversion process the asbestos component.
Asbest stellt einen Gefahrstoff dar, der in einer Vielzahl unterschiedlicher Produkte enthalten ist. Der Umgang mit diesen Stoffen ist fast vollständig verboten mit Ausnahme von Abbruch-, Sanierungs- und Instandhaltungsarbeiten. Die dabei anfallenden Abfälle werden nach dem derzeitigen Stand der Technik in unbefriedigender Weise auf Deponien abgelagert. In den nächsten Jahrzehnten werden auf Grund der genannten Arbeiten und der auslaufenden Einsatzzeit (Ende der Lebensdauer) allein in Deutschland ca. 30 Millionen Tonnen Asbestzementabfälle anfallen, die nach dem derzeitigen Stand der Technik zu deponieren wären. Weiterhin stellt zur Zeit die Entsorgung von Asbestzementrohren ein ungelöstes Problem insofern dar, daß diese vor der Ablagerung auf Deponien zerstört oder ihre Hohlräume aufgefüllt werden müssen.Asbestos is a hazardous substance contained in a variety of different products is. Dealing with these substances is almost completely prohibited with the exception of demolition, Renovation and maintenance work. The resulting waste is after the present state of the art unsatisfactorily deposited on landfills. In the next decades will be due to the work mentioned and the expiring Operating time (end of life) in Germany alone about 30 million tons Asbestos cement waste incurred to deposit the current state of the art would. Furthermore, the disposal of asbestos cement pipes is currently unresolved Problem in that it destroys before dumping on landfills or their voids must be filled.
Neben der Deponierung von Asbestzementabfällen ist deren Entsorgung auf der Basis einer chemischen oder thermischen Behandlung bekannt. So wird in der DE-OS 37 28 787 ein Verfahren zur Beseitigung von Asbestrückständen beschrieben, das dadurch gekennzeichnet ist, daß diese in einem Drehofen auf ca. 800°C unter Zugabe eines Reaktionsmittels, z. B. Phosphorsäure, zu Zement oder Forsterit umgewandelt werden sollen.In addition to the landfill of asbestos cement waste their disposal is based on a chemical or thermal treatment known. Thus, in DE-OS 37 28 787 a Described method for the removal of asbestos residues, characterized is that these in a rotary kiln to about 800 ° C with the addition of a reagent, eg. B. Phosphoric acid, to be converted to cement or forsterite.
In der DE-OS 40 23 881 wird ein Verfahren zur Herstellung schwermetallhaltiger auslaugbeständiger Gläser unter Zusatz von Glasbildnern beschrieben. In einer Ausgestaltungsvariante der Erfindung werden dem thermisch zu behandelnden Müll einer Müllverbrennungsanlage glasbildende Stoffe zugesetzt, die die Einstellung des Calcium-, Silicium-, und/oder Aluminiumgehaltes in einem definierten Bereich ermöglichen. Der Gehalt an Silicium kann in Form von Sand, gefällter Kieselsäure und u. a. auch Asbest eingestellt werden. Der Asbest wird bei Temperaturen von bis zu 1450°C in die Innenstruktur des Glases absorbiert und damit Teil der Molekülstruktur. Die Faserstruktur der Asbestabfälle ist damit aufgehoben. Die so gewonnenen Gläser können beispielsweise als Kiesersatz in Baustoffen verwendet werden.In DE-OS 40 23 881 a process for the production of heavy metals is leach-resistant glasses described with the addition of glass formers. In a Embodiment variant of the invention, the thermally treated waste a Waste incinerator added glass-forming substances which inhibit the cessation of Allow silicon and / or aluminum content in a defined range. The content of Silicon can be in the form of sand, precipitated silica and u. a. also set asbestos become. The asbestos gets into the internal structure of the glass at temperatures of up to 1450 ° C absorbed and thus part of the molecular structure. The fibrous structure of asbestos waste is so canceled. The glasses thus obtained can be used, for example, as a gravel substitute in building materials be used.
Weitere thermische Verfahren beziehen sich auf das Einbringen von asbesthaltigem Abfall in die Schmelzzone eines metallurgischen Schachtofens (DE-OS 43 01 977). Zerkleinerter Asbestabfall wird mit Steinkohlestaub, Natriumcarbonat, Calciumfluorid und einem wasserlöslichen organischen Bindemittel vermischt und nachfolgend zerkleinert. Das zerkleinerte Gemisch wird in einem Lichtbogen bei 1400°C reduzierend geschmolzen. Aus dem Schmelzofen erfolgt ein getrennter Abzug des teils mineralischen und des teils metallischen Schmelzgutes. Die mineralische Schlacke kann zu einem für die Baustoffherstellung verwertbaren Rohstoff weiterverarbeitet werden, das metallische Schmelzgut als Ausgangsstoff oder als Zuschlag für Metallverhüttungsverfahren dienen (DE-OS 40 04 201).Other thermal processes relate to the incorporation of asbestos-containing waste into the melting zone of a metallurgical shaft furnace (DE-OS 43 01 977). crushed Asbestos waste is mixed with coal dust, sodium carbonate, calcium fluoride and a water-soluble organic binder and subsequently comminuted. The crushed mixture is melted reducing in an arc at 1400 ° C. From the Melting furnace is a separate deduction of the partly mineral and partly metallic Melting material. The mineral slag can become one for the production of building materials recyclable raw material to be further processed, the metallic melt as raw material or serve as a supplement for metal smelting process (DE-OS 40 04 201).
In der DE-OS 40 35 358 wird ein Verfahren zur thermischen Behandlung von Asbestabfällen in einem Drehrohrofen beschrieben. In dem Drehrohrofen werden die Abfälle umgewälzt und bei Temperaturen von etwa 1100°C über einen Zeitraum von 30 bis 70 Minuten behandelt. Dabei erfolgt eine Modifizierung des Asbestfasermaterials in vorwiegend Forsterit.In DE-OS 40 35 358 a process for the thermal treatment of asbestos waste in a rotary kiln described. In the rotary kiln, the waste is circulated and at Temperatures of about 1100 ° C over a period of 30 to 70 minutes treated. there there is a modification of the asbestos fiber material in predominantly forsterite.
Weiterhin ist ein Einschluß der asbesthaltigen Abfallstoffe in staubdicht verschlossene Behälter mit nachfolgender Aufgabe in einen Schmelzofen bekannt (DE-OS 42 27 024).Furthermore, inclusion of asbestos-containing wastes in dust-tight sealed containers with subsequent task in a melting furnace known (DE-OS 42 27 024).
Gemäß der DE-OS 39 31 686 erfolgt das Schmelzen der Asbestfasermaterialien in Anwesenheit eines Flußmittels bei Temperaturen unterhalb 1000°C und Überführung in ungefährliche Metalloxide.According to DE-OS 39 31 686, the melting of the asbestos fiber materials takes place in Presence of a flux at temperatures below 1000 ° C and transfer into harmless metal oxides.
Aus der DE-OS 39 14 553 ist die Versinterung der Faserstrukturen von Chrysotil und Krokydolith unter gleichzeitiger mechanischer Beeinflussung, wobei diese nicht näher erläutert ist, bekannt.From DE-OS 39 14 553, the sintering of the fiber structures of chrysotile and Crocidolite with simultaneous mechanical interference, which does not explain in more detail is known.
Die Einbindung von industriellen Asbestabfällen in Pellets gemeinsam mit Glas, Alkalimetallsalzen oder anderen Alkalichloriden und Eisen oder Eisensalz und Erhitzung auf 800°C bis 1200°C ist aus der EP 0 568 367 und das Schmelzen von Asbest in einem Induktionsofen bei mindestens 1250°C, vorzugsweise 1400°C bis 1500°C, mit nachfolgender Wiederverwendung des sich gebildeten Silikatproduktes in keramischen oder Glasindustrie aus der EP 0 265 051 bekannt.The integration of industrial asbestos waste in pellets together with glass, Alkali metal salts or other alkali chlorides and iron or iron salt and heating 800 ° C to 1200 ° C is known from EP 0 568 367 and the melting of asbestos in one Induction furnace at at least 1250 ° C, preferably 1400 ° C to 1500 ° C, with the following Reuse of the silicate product formed in the ceramic or glass industry EP 0 265 051.
Der Nachteil der chemischen Verfahren zur Behandlung von Asbestzementabfällen besteht darin, daß ein umfangreicher Einsatz des Verfahrens ein entsprechend hohes Aufkommen an Gefahrstofftransporten durch den Transport von Flußsäure bedingen würde, die bei Unfällen schwere Schäden an der Umwelt oder Personen verursachen können. Außerdem ist Flußsäure eine sehr teure Chemikalie, so daß diese Verfahren an sich sehr kostenaufwendig sind.The disadvantage of the chemical processes for the treatment of asbestos cement waste consists in that an extensive use of the method a correspondingly high volume of Transport of hazardous substances through the transport of hydrofluoric acid would be the cause of accidents cause serious damage to the environment or to persons. Besides, hydrofluoric acid is a very expensive chemical, so that these methods are very costly in and of themselves.
Nachteil der genannten thermischen Verfahren ist der Umstand, daß bei Behandlung von Asbestzementprodukten mit maximal 15% Asbestanteil 85 . . . 90% der hydratisierten Zement matrix bis zur Zersetzung der Asbestminerale bzw. bis zur Schmelzebildung bei Verglasung aufgeheizt werden muß, ohne daß für die Zementkomponente dafür eine ursächliche Notwendigkeit besteht. Der erforderliche Energieaufwand ist, bezogen auf den niedrigen Asbestanteil, unangemessen hoch.Disadvantage of the mentioned thermal processes is the fact that during treatment of Asbestos cement products with a maximum of 15% asbestos content 85. , , 90% of the hydrated cement matrix until the decomposition of the asbestos minerals or until the formation of molten glass must be heated without a causal for the cement component Need exists. The required energy expenditure is based on the low energy consumption Asbestos share, unreasonably high.
Die Aufgabe der Erfindung besteht darin, ein Verfahren zur Behandlung und umweltverträglichen Verwertung von Asbestzementprodukten zu entwickeln, das gegenüber dem Stand der Technik kostengünstig ist und ein Risiko gegenüber schädlichen Umwelteinflüssen nahezu vollständig ausschließt.The object of the invention is a method of treatment and to develop environmentally friendly recycling of asbestos cement products the state of the art is inexpensive and at risk from harmful Excludes environmental influences almost completely.
Erfindungsgemäß wird das entsprechend des kennzeichnenden Merkmales des Patent anspruches dadurch gelöst daß die Asbestzementprodukte in einem Schwarzbereich mit Unterdruckhaltung grobzerkleinert und in einer Mühle aufgemahlen werden. Das so erhaltene Asbestzementmehl wird im Bereich der Drehofenflamme einer Zementklinker-Produktionslinie eingeblasen. Der Anteil des eingeblasenen Asbestzementmehls beträgt in Abhängigkeit von der eingesetzten Brennstoffart 2 bis 5%, bezogen auf die Zementrohmehlmischung, wobei jeweils 2 bis 5% der Zementrohmehlmischung substituiert werden.According to the invention that according to the characterizing feature of the patent claim solved in that the asbestos cement products in a black area with Low pressure crushed and ground in a mill. The thus obtained Asbestos cement flour is used in the area of the rotary kiln flame of a cement clinker production line blown. The proportion of injected asbestos cement flour is dependent on the type of fuel used 2 to 5%, based on the cement raw meal mixture, wherein in each case 2 to 5% of the cement raw meal mixture are substituted.
Bei Einsatz aschehaltiger fester Brennstoffe wird die zudosierbare Asbestzementmehlmenge mit maximal 3% limitiert. Bei Öl- bzw. Gasfeuerung wird die Obergrenze des Asbestzement mehlanteils mit 5% festgelegt.When ash-containing solid fuels are used, the dosable amount of asbestos cement flour is added limited to a maximum of 3%. When oil or gas firing is the upper limit of asbestos cement 5%.
Infolge der hohen Flammentemperaturen von 1800°C werden die Asbestanteile umgewandelt und der thermisch modifizierte Reststoff durch Assimilation im Brenngut des Ofens aufgenommen und damit Bestandteil des Zementklinkers.Due to the high flame temperatures of 1800 ° C, the asbestos components are converted and the thermally modified residue by assimilation in the kiln kiln absorbed and thus part of the cement clinker.
Vorteilhaft ist dabei die nahezu identische chemische Zusammensetzung von Brenngut und der im Flammenbereich thermisch behandelten Zementmatrix des Asbestzementmehls.The advantage here is the almost identical chemical composition of kiln and the In the flame area thermally treated cement matrix of asbestos cement flour.
Mit Passieren des Flammenbereichs erfolgt im Asbestanteil durch Freisetzung des Kristallwassers eine Zerstörung der Gitterstruktur und gleichzeitig Neubildung wasserfreier Magnesiumsilikate. Die Fasermorphologie der Asbestkomponente erfährt dabei eine vollständige Umwandlung.With passage of the flame area takes place in the asbestos part by release of the Kristallwassers a destruction of the lattice structure and at the same time new formation anhydrous Magnesium silicates. The fiber morphology of the asbestos component undergoes a complete conversion.
Die bei der Herstellung normgerechter Portlandzemente notwendige Begrenzung des MgO- Gehaltes zur Vermeidung von Magnesiatreiben im Beton erfordert eine gezielte Einbeziehung der Asbestzementkomponente in die Berechnung der vorgegebenen Zusammensetzung des Rohmehls als Aufgabematerial bzw. des Klinkers als Endprodukt bei der Zementklinkerherstellung.The limitation of the MgO required in the production of Portland cements Content to avoid Magnesiatreiben in concrete requires a targeted inclusion the asbestos cement component in the calculation of the given composition of the Raw meal as a feed material or the clinker as the end product in the Cement clinker production.
Erfindungsgemäß können eventuell enthaltene organische Bestandteile im Asbestzement bei Durchgang durch die Flamme quantitativ verbrannt und damit schadlos beseitigt werden.According to the invention, any organic constituents may be present in the asbestos cement Passage through the flame quantitatively burned and thus eliminated without damage.
Die Vorteile des erfindungsgemäßen Verfahrens bestehen darin, daß Asbestzementprodukte kostengünstig und umweltverträglich verwertet werden können und das so entstandene Produkt einen hochwertigen Baustoff darstellt, der keinerlei schädliche Umwelteinflüsse auslöst.The advantages of the method according to the invention are that asbestos cement products can be recycled cost-effectively and environmentally friendly and the resulting Product represents a high quality building material, which does not have any harmful environmental influences triggers.
Die Erfindung wird anhand eines Ausführungsbeispiels näher erläutert. The invention will be explained in more detail with reference to an embodiment.
Die Asbestzementprodukte werden im Schwarzbereich mit Unterdruckhaltung geshreddert und anschließend in einer Mühle aufgemahlen. Das so hergestellte Asbestzementmehl wird im Bereich der Drehofenflamme eines Portlandzementklinkerherstellungsprozesses zugeführt. Zur Herstellung von Portlandzementklinker in einem Zementwerk ist zur Sicherung der geforderten Klinkerqualität das zu sinternde Rohmehl mit den ParameternThe asbestos cement products are shredded in the black area with negative pressure and then ground in a mill. The asbestos cement flour thus prepared is used in Area of the rotary kiln flame of a Portland cement clinker production process supplied. For the production of Portland cement clinker in a cement plant is to secure the required clinker quality, the raw meal to be sintered with the parameters
konstant zu halten.to keep constant.
Die dazu erforderliche Mischung von Rohstoffen besteht ausThe required mixture of raw materials consists of
Eine Zugabe von Asbestzementmehl als weitere Rohmehlkomponente in Höhe von 2%, bezogen auf die ursprüngliche Rohmehlmischung, hat bei Einhaltung der geforderten Rohmehlparameter zur Folge, daß 1% Kalkstein und 1% Sand substituiert werden. Bezogen auf einen Anlagendurchsatz von 2000 t Klinker/d können 70 t Asbestzementmehl/d zudosiert werden.Addition of asbestos cement flour as further raw meal component in the amount of 2%, based on the original raw meal mixture, has adhered to the required Roehmehlparameter result in that 1% limestone and 1% sand are substituted. Based on a system throughput of 2000 t clinker / d, 70 t of asbestos cement flour / d can be used be dosed.
Der bei normalem Rohmehleinsatz resultierende MgO-Gehalt von Klinker von z. B. 1.8 . . . 2.0% steigt bei Zugabe von Asbestzementmehl mit o. g. Anteil auf ca. 2.0 . . . 2.1% und liegt damit deutlich unter dem Grenzwert einschlägiger Zementnormen mit MgO 5%.The resulting in normal raw meal use MgO content of clinker of z. B. 1.8. , , 2.0% increases with the addition of asbestos cement flour with o. g. Share on approx. 2.0. , , 2.1% and is thus well below the limit of relevant cement standards with MgO 5%.
Claims (2)
Priority Applications (13)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4423728A DE4423728A1 (en) | 1994-06-25 | 1994-06-25 | Process for the treatment and environmentally sound recovery of asbestos cement products |
| DE59506829T DE59506829D1 (en) | 1994-06-25 | 1995-06-14 | Process for the treatment and environmentally sound recycling of asbestos cement products |
| DK95109235T DK0688742T3 (en) | 1994-06-25 | 1995-06-14 | Process for treatment and environmentally friendly disposal of asbestos cement products |
| AT95109235T ATE184584T1 (en) | 1994-06-25 | 1995-06-14 | METHOD FOR THE TREATMENT AND ENVIRONMENTALLY FRIENDLY USE OF ASBESTOS CEMENT PRODUCTS |
| ES95109235T ES2138117T3 (en) | 1994-06-25 | 1995-06-14 | METHOD OF TREATMENT OF ASBESTOS CEMENT AND ITS NON-CONTAMINATING USE. |
| EP95109235A EP0688742B1 (en) | 1994-06-25 | 1995-06-14 | Method for treatment of asbestos-cement products and environmentally friendly use thereof |
| CZ19951609A CZ287345B6 (en) | 1994-06-25 | 1995-06-19 | Process of treating and environmentally tolerable exploitation of asbestos-cement products |
| US08/492,727 US5676750A (en) | 1994-06-25 | 1995-06-20 | Process of treatment and environment-friendly utilization of asbestos-cement products |
| HU9501807A HU220396B (en) | 1994-06-25 | 1995-06-20 | Method for treatment of asbestcement products |
| CA002152219A CA2152219A1 (en) | 1994-06-25 | 1995-06-20 | Process of treatment and environment-friendly utilization of asbestos-cement products |
| SK825-95A SK280428B6 (en) | 1994-06-25 | 1995-06-22 | Process for treating asbestos-cement products and environmentally friendly use thereof |
| PL95309366A PL179957B1 (en) | 1994-06-25 | 1995-06-26 | Method of obtaining cement clinker |
| GR990403172T GR3032081T3 (en) | 1994-06-25 | 1999-12-08 | Method for treatment of asbestos-cement products and environmentally friendly use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4423728A DE4423728A1 (en) | 1994-06-25 | 1994-06-25 | Process for the treatment and environmentally sound recovery of asbestos cement products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4423728A1 true DE4423728A1 (en) | 1996-01-04 |
Family
ID=6522414
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4423728A Withdrawn DE4423728A1 (en) | 1994-06-25 | 1994-06-25 | Process for the treatment and environmentally sound recovery of asbestos cement products |
| DE59506829T Expired - Fee Related DE59506829D1 (en) | 1994-06-25 | 1995-06-14 | Process for the treatment and environmentally sound recycling of asbestos cement products |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE59506829T Expired - Fee Related DE59506829D1 (en) | 1994-06-25 | 1995-06-14 | Process for the treatment and environmentally sound recycling of asbestos cement products |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US5676750A (en) |
| EP (1) | EP0688742B1 (en) |
| AT (1) | ATE184584T1 (en) |
| CA (1) | CA2152219A1 (en) |
| CZ (1) | CZ287345B6 (en) |
| DE (2) | DE4423728A1 (en) |
| DK (1) | DK0688742T3 (en) |
| ES (1) | ES2138117T3 (en) |
| GR (1) | GR3032081T3 (en) |
| HU (1) | HU220396B (en) |
| PL (1) | PL179957B1 (en) |
| SK (1) | SK280428B6 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2047918A1 (en) | 2007-10-08 | 2009-04-15 | MCT-Establishment | Method and device for processing asbestos cement |
| US7886646B2 (en) | 2003-10-02 | 2011-02-15 | Rheinmetall Waffe Munition Gmbh | Method and apparatus for protecting ships against terminal phase-guided missiles |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE195305T1 (en) * | 1996-07-15 | 2000-08-15 | Eternit Ag | METHOD FOR DISPOSAL OF FIBER CEMENT WASTE PRODUCTS |
| ITMO20010078A1 (en) * | 2001-04-27 | 2002-10-27 | Walter Palladini | PROCEDURE AND PLANT FOR DISPOSAL OF MANUFACTURES CONTAINING ASBESTOS |
| EP1919637B1 (en) * | 2005-06-30 | 2011-09-21 | Ari Technologies, Inc. | System and method for accelerating the conversion of asbestos in the process of mineralogical conversion |
| US7939705B2 (en) * | 2005-06-30 | 2011-05-10 | Ari Technologies, Inc. | System and method for treating asbestos |
| WO2007034816A1 (en) * | 2005-09-20 | 2007-03-29 | Inter-University Research Institute National Institutes Of Natural Sciences | Method for modification of asbestos |
| US8343274B2 (en) * | 2009-05-11 | 2013-01-01 | Al-Yateem Abdullah A | Environmental composition and method for making the same |
| CZ2013972A3 (en) * | 2013-12-05 | 2015-06-24 | Ăšstav struktury a mechaniky hornin AV ÄŚR, v. v. i. | Asbestos processing method |
| CZ306605B6 (en) * | 2016-01-22 | 2017-03-22 | Výzkumný ústav stavebních hmot, a.s. | A method of utilizing asbestos-cement waste |
| CN111205003B (en) * | 2020-01-19 | 2021-06-25 | 武汉理工大学 | Preparation method of regenerated cementing material |
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| DE3728787A1 (en) * | 1987-08-28 | 1989-03-09 | Heribert Hiendl | Process for the disposal of residues formed in asbestos production |
| DE3914553A1 (en) * | 1989-05-03 | 1990-11-08 | Hoelter Heinz | Thermal and mechanical treatment of asbestos materials - to avoid health risks |
| US5096692A (en) * | 1989-06-29 | 1992-03-17 | Ek Roger B | Mineralogical conversion of asbestos waste |
| DE4125169A1 (en) * | 1991-07-30 | 1993-02-04 | Passavant Werke | Final disposal process for asbestos - by incorporation in vitrifying furnace slag |
| DE4301977C1 (en) * | 1993-01-26 | 1994-01-05 | Ehlert Umwelttechnik Gmbh Dr | Asbestos disposal process - with modification of asbestos by high temp. heating by injection of shredded asbestos contg. material into melting zone of metallurgical shaft furnace |
| DE4239565A1 (en) * | 1992-11-25 | 1994-05-26 | Solvay Umweltchemie Gmbh | Easy setting cement mixt. - contg. decontaminated asbestos cement which is opt. neutralised and is free from water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0265051A1 (en) | 1986-08-26 | 1988-04-27 | Czerwinski, Jan | Process and apparatus for rendering asbestos environmentally safe |
| DE3931686A1 (en) | 1989-09-22 | 1991-04-04 | Inst Bauphysik Und Bauchemie B | METHOD FOR THE DISPOSAL OF PRODUCTS CONTAINING ASBESTS FROM THESE EXTENDED ASBEST FIBER-BASED PRODUCTS, AS SPRAY ASBEST OR THE LIKE, AS PART OF THE ASBESTRES CLEANING. AND DISPOSAL DEVICE FOR IMPLEMENTING THE PROCESS |
| DE4004201A1 (en) | 1990-02-12 | 1991-08-14 | Ortlepp Wolfgang | Disposal of harmful matter esp. asbestos waste - by melting with coal or coke and flux giving prods. useful for making building material and in metallurgy |
| DE4023881A1 (en) | 1990-07-27 | 1992-01-30 | Kali Chemie Ag | Heavy metal contg. leach resistant glass - by adding glass formers to molten slag or to combustion prods. |
| DE4035358A1 (en) | 1990-11-07 | 1992-05-21 | Johannes Dieter | Disposal of asbestos containing material is removed from its supporting substrate by high pressure water jets and put in receptacle, together with water and heated furnace for converting into harmless form |
| DE4139927A1 (en) * | 1991-12-04 | 1993-06-09 | Solvay Umweltchemie Gmbh | USE OF RESIDUE OF ASBESTIC DECOMPOSITION AS AN ADDITIONAL MATERIAL FOR BUILDING MATERIALS |
| GB9209435D0 (en) | 1992-05-01 | 1992-06-17 | Dow Deutschland Inc | Process for treating industrial wastes of asbestos |
| DE4227024C2 (en) | 1992-08-14 | 1995-10-12 | S & I Umweltsanierung Gmbh | Process for the disposal of waste containing asbestos |
| DE4312102A1 (en) * | 1993-04-08 | 1994-10-13 | Witega Angewandte Werkstoff Forschung Gemeinnuetzige Gmbh Adlershof | Method of disposing of asbestos-cement structural elements with regard to material recovery |
| DE4330551A1 (en) * | 1993-09-09 | 1995-03-16 | Werner Prof Dr Rammensee | Process for the environmentally tolerable disposal of mineral fibres and substances containing mineral fibres and their conversion into materials of value |
-
1994
- 1994-06-25 DE DE4423728A patent/DE4423728A1/en not_active Withdrawn
-
1995
- 1995-06-14 ES ES95109235T patent/ES2138117T3/en not_active Expired - Lifetime
- 1995-06-14 DK DK95109235T patent/DK0688742T3/en active
- 1995-06-14 AT AT95109235T patent/ATE184584T1/en not_active IP Right Cessation
- 1995-06-14 EP EP95109235A patent/EP0688742B1/en not_active Expired - Lifetime
- 1995-06-14 DE DE59506829T patent/DE59506829D1/en not_active Expired - Fee Related
- 1995-06-19 CZ CZ19951609A patent/CZ287345B6/en not_active IP Right Cessation
- 1995-06-20 HU HU9501807A patent/HU220396B/en not_active IP Right Cessation
- 1995-06-20 CA CA002152219A patent/CA2152219A1/en not_active Abandoned
- 1995-06-20 US US08/492,727 patent/US5676750A/en not_active Expired - Fee Related
- 1995-06-22 SK SK825-95A patent/SK280428B6/en unknown
- 1995-06-26 PL PL95309366A patent/PL179957B1/en unknown
-
1999
- 1999-12-08 GR GR990403172T patent/GR3032081T3/en unknown
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|---|---|---|---|---|
| DE3728787A1 (en) * | 1987-08-28 | 1989-03-09 | Heribert Hiendl | Process for the disposal of residues formed in asbestos production |
| DE3914553A1 (en) * | 1989-05-03 | 1990-11-08 | Hoelter Heinz | Thermal and mechanical treatment of asbestos materials - to avoid health risks |
| US5096692A (en) * | 1989-06-29 | 1992-03-17 | Ek Roger B | Mineralogical conversion of asbestos waste |
| DE4125169A1 (en) * | 1991-07-30 | 1993-02-04 | Passavant Werke | Final disposal process for asbestos - by incorporation in vitrifying furnace slag |
| DE4239565A1 (en) * | 1992-11-25 | 1994-05-26 | Solvay Umweltchemie Gmbh | Easy setting cement mixt. - contg. decontaminated asbestos cement which is opt. neutralised and is free from water |
| DE4301977C1 (en) * | 1993-01-26 | 1994-01-05 | Ehlert Umwelttechnik Gmbh Dr | Asbestos disposal process - with modification of asbestos by high temp. heating by injection of shredded asbestos contg. material into melting zone of metallurgical shaft furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7886646B2 (en) | 2003-10-02 | 2011-02-15 | Rheinmetall Waffe Munition Gmbh | Method and apparatus for protecting ships against terminal phase-guided missiles |
| EP2047918A1 (en) | 2007-10-08 | 2009-04-15 | MCT-Establishment | Method and device for processing asbestos cement |
| WO2009046963A2 (en) * | 2007-10-08 | 2009-04-16 | Mct-Establishment | Method and device for processing asbestos cement |
| WO2009046963A3 (en) * | 2007-10-08 | 2009-10-15 | Mct-Establishment | Method and device for processing asbestos cement |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0688742B1 (en) | 1999-09-15 |
| CZ160995A3 (en) | 1996-01-17 |
| HU220396B (en) | 2002-01-28 |
| HUP9501807A2 (en) | 2001-09-28 |
| PL309366A1 (en) | 1995-12-27 |
| HU9501807D0 (en) | 1995-08-28 |
| SK82595A3 (en) | 1996-01-10 |
| ES2138117T3 (en) | 2000-01-01 |
| PL179957B1 (en) | 2000-11-30 |
| DE59506829D1 (en) | 1999-10-21 |
| DK0688742T3 (en) | 1999-12-20 |
| SK280428B6 (en) | 2000-02-14 |
| ATE184584T1 (en) | 1999-10-15 |
| CZ287345B6 (en) | 2000-10-11 |
| US5676750A (en) | 1997-10-14 |
| GR3032081T3 (en) | 2000-03-31 |
| EP0688742A1 (en) | 1995-12-27 |
| CA2152219A1 (en) | 1995-12-26 |
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Free format text: PATENTANSPRUCH 1, SPALTE 4, ZEILE 15 "VON CA. 180 000" AENDERN IN: "VON CA. 1800(GRAD)C" |
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| 8181 | Inventor (new situation) |
Free format text: GLEICHMAR, GERD, DR.-ING., 99869 GUENTHERSLEBEN, DE KIESER, JOACHIM, DR.RER.NAT., 99094 ERFURT, DE AMBROSIUS, STEFAN, DIPL.-ING., 99439 BERLSTEDT, DE GOERMAR, HELMUT, 99425 WEIMAR, DE KRAEHNER, ARNO, DR.-ING., 99423 WEIMAR, DE BUHRANDT, WOLF-JOACHIM, 07747 JENA, DE |
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Owner name: IBU-TEC GMBH & CO. KG, 99425 WEIMAR, DE TUEV THUER |
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